diff --git a/src/video/opengl.cpp b/src/video/opengl.cpp
--- a/src/video/opengl.cpp
+++ b/src/video/opengl.cpp
@@ -1309,7 +1309,7 @@ void OpenGLBackend::RenderOglSprite(Open
 			_glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
 
 			_glBufferSubData(GL_PIXEL_UNPACK_BUFFER, 0, 256, GetNonSprite(GB(pal, 0, PALETTE_WIDTH), ST_RECOLOUR) + 1);
-			_glTexSubImage1D(GL_TEXTURE_1D, 0, 0, 256, GL_RED, GL_UNSIGNED_BYTE, 0);
+			_glTexSubImage1D(GL_TEXTURE_1D, 0, 0, 256, GL_RED, GL_UNSIGNED_BYTE, nullptr);
 
 			_glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);